Here in the open loop preset of no 02, the other sensor to take its place is an atmo sensor. That's the one under the seat, left side, looks like the intake air pressure sensor and those are interchangeable like the sub and throttle sensors.
APS = Atmospheric pressure sensor ~ Open loop.
02 - Atmospheric adjusting sensor ~ Closed loop.
Watt happens to a lost APS/02 signal? "We take precautions to keep the engine running safely while you take this 'check engine light' situation in for service."
The engine management now takes on a "backup" number as in what number do we live in? 14.7/1 atm/1ATMO, i.e., The Penultimate number. So if you disconnected the atmo/02 [same function] sensor, the bike goes into an "a-N method" in the upper rpm's. If say the lower band of idle to mid-range failed, [throttle position], this method would kick in on the low to mid range and that is called the "J-D method."
This will pop a code on the dash if disconnected/shorts out. So this says your input is not in analog anymore with many value inputs for said elevation, rather you are stuck with one number over and over and in a limp state with limited range = Loss of HP.
Pipe change + 02 in service = More HP
Pipe change - elimination of a sensor = Less HP or safe mode.
My 02 has to sit at the collector or the intersection of all 4 pipes so it knows the next cylinder fire is an elevation change in a gradual rise up a mountain and with height there is less air. 02 sees more fuel and cuts it down in proportion to the elevation change. The atmo sensor applies the same numbers in a way under open loop as in, I can match any sensor because electricity can be measured and now I can mimic the numbers equally if I build an 02 or APS.
If I close off a pipe with the 02's nose, I caused a restriction. If I send a hole in the collector, I have a larger opening of flow. I want my stock sensors in play or I pay detuning my computer bike.
Tormenting the motorcycling community one post at a time
